For centuries, the renowned thermal-mineral water (Tempel, Styria, Donat), rich in minerals, has been known as the natural treasure of Rogaška Slatina and holds a special status of the medicinal drinking water treating alimentary tract conditions. This gift of nature has acquired new meaning a decade ago, by adding spa and recreation dimensions – the Artesian spring of thermalmineral water, which is found 1700 m below surface. Its water is hyperthermal with 5800 mg/l dissolved mineral substances. The spring water temperature reaches 59°C, its power is 11 l/s.

The temperatures in the swimming pool range from 31°C to 36°C isotherm.